var commentHandle="/TE_CommentSystem/TE_CommentSystem.php";
var TECommentSystem=function()
{
	var $A=YAHOO.util.Anim,$C=YAHOO.util.Connect,$D=YAHOO.util.Dom,$E=YAHOO.util.Event,$U=YAHOO.util;
	var callbackObj={},retObj={handle:'',container:'',captcha:''
};

function _parseJSON(str)
{
	return(/^(\s+|[,:{}\[\]]|"(\\["\\\/bfnrtu]|[^\x00-\x1f"\\]+)*"|-?\d+(\.\d*)?([eE][+-]?\d+)?|true|false|null)+$/.test(str))&&eval('('+str+')');
}

function _setMssg(elem,mssg)
{
	var errorMSSG=$D.getElementsByClassName('comment_error','DIV',elem);
	if(errorMSSG.length!=0)
	{
		if(mssg.length==0)
		{
			$D.setStyle(errorMSSG[0],'visibiliy','hidden');
			$D.setStyle(errorMSSG[0],'display','none');
		}
		else
		{
			$D.setStyle(errorMSSG[0],'visibiliy','visible');
			$D.setStyle(errorMSSG[0],'display','block');
		}
		errorMSSG[0].innerHTML=mssg;
	}
	else
	{
		alert(mssg);
	}
}

function collapseExpand(elem)
{
	$E.preventDefault('click');
	var toModify=$D.getElementsByClassName('comment_body',null,elem),attr,anim;
	if(elem.innerHTML=='[+]')
	{
		elem.innerHTML='[-]';
	}
	else
	{
		elem.innerHTML='[+]';
	}
	
	while(toModify.length==0&&elem)
	{
		elem=elem.parentNode;toModify=$D.getElementsByClassName('comment_body',null,elem);
	}
	
	if(toModify.length>0)
	{
		$D.setStyle(toModify[0],'overflow','hidden');
		var start=function()
		{
			$D.setStyle(toModify[0],'overflow','hidden');
		};
		
		var finish=function()
		{
			$D.setStyle(toModify[0],'overflow','auto');
		};
		
		if($D.hasClass(toModify[0],"item_collapsed"))
		{
			attr={height:{to:toModify[0].getAttribute('myOffset')}};		
			$D.removeClass(toModify[0],"item_collapsed")
		}
		else
		{
			toModify[0].setAttribute('myOffset',toModify[0].offsetHeight,true);
			attr={height:{to:0}};
		
			$D.addClass(toModify[0],"item_collapsed")
		}
		
		anim=new $A(toModify[0],attr,0.7,$U.Easing.easeOut);
		anim.onStart.subscribe(start);
		anim.onComplete.subscribe(finish);
		anim.animate();
	}
};
	
function setHandle(handle)
{
	retObj.handle=handle;
};

function setCaptchaElement(captcha)
{
	retObj.captcha=captcha;
}
	
function setContainer(container)
{
	retObj.container=container;
	loadComments();
};

function loadComments()
{
	transObj=$C.asyncRequest('POST',retObj.handle,callbackObj,"action=get&from="+document.location);
};

function postComment(formObj,container)
{
	formObj.onsubmit=function()
	{return false;};
	_setMssg(formObj,'');
	$C.setForm(formObj);
	callbackObj.argument=formObj;transObj=$C.asyncRequest('POST',retObj.handle,callbackObj,"action=insert&from="+document.location);
};

function postSuccess(o)
{
	var commentObj=_parseJSON(o.responseText),errorMSSG;
	if((commentObj)&&(typeof commentObj=='object'))
	{
		if(commentObj.comments)
		{
			for(var i=commentObj.comments.length-1;i>=0;i--)
			{
				insertComment(commentObj.comments[i]);
			}
			
			if(o.argument)
			{
				o.argument.reset();
			}
		}
	}
	else
	{
		if(o.argument)
		{
			_setMssg(o.argument,o.responseText);
		}
	};
	reloadImg();
};

function postFailure(o)
{
	if(o.argument)
	{
		_setMssg(o.argument,o.responseText);
		o.argument.reset();
	}
	
	reloadImg();
};

function insertComment(cItem)
{
	var commentsContainer,sItem="<div class='item_container'>";
	cItem.commentBody=cItem.commentBody.replace(/\\n/gi,'<br>');
	sItem+="<div class='comment_item'>"+"<div class='comment_author'><a href='javascript:void(0)' class='expand_control' onclick='TECommentSystem.collapseExpand(this)'>[-]</a>&nbsp;&nbsp;"+((cItem.authorSite)?"<a href='"+cItem.authorSite+"' target='_blank'>"+cItem.commentAuthor+"</a>":cItem.commentAuthor)+"&nbsp;<small>"+cItem.commentDate+"</small></div>"+"<div class='comment_body'>"+cItem.commentBody+"</div>"+"</div>";commentsContainer=$D.get(retObj.container);
	
	if(commentsContainer)
	{
		commentsContainer.innerHTML+=sItem;
	}
};

function reloadImg()
{
	if(retObj.captcha!='')
	{
		captchaIMG=$D.get(retObj.captcha);
		if(captchaIMG&&retObj.handle!='')
		{
			captchaIMG.src=retObj.handle+"?.png"+Math.random();
		}
	}
};

callbackObj.success=postSuccess;
callbackObj.failure=postFailure;
retObj.post=postComment;
retObj.collapseExpand=collapseExpand;
retObj.setHandle=setHandle;
retObj.setContainer=setContainer;
retObj.setCaptcha=setCaptchaElement;
return retObj;
}

();YAHOO.util.Event.addListener(window,'load',
function()
{
	TECommentSystem.setHandle(commentHandle);
	TECommentSystem.setContainer('commentContainer');
	TECommentSystem.setCaptcha('commentCaptcha');
});